Abstract: A motor control device includes first and second pairs of transistors each connected to a power source, the first pair of transistors being adapted for connection to the terminals of the motor and capable of operating to connect the motor to the power source so that the motor is driven in a forward direction when the first pair of transistors conduct, the second pair of transistors being adapted for connection to the terminals of the motor and capable of operating to reversibly connect the motor to the power source so that the motor is driven in a reverse direction when the second pair of transistors conduct, first and second input terminals capable of receiving as input a signal for controlling the motor, a first element connected to the first input terminal and responsive to said signal to cause the first pair of transistors to conduct, the first element including a device responsive to said signal to prevent conduction of the second pair of transistors, a second element connected to the second input termin

Abstract: Aperture-priority, shutter-priority, and programmed automatic exposure modes may be selected, with or without automatic focus control. For certain types of operation, the diaphragm value of a photographic lens is set to a value between maximum and minimum diaphragm values in response to measurement of the luminance value of an object, and when the set diaphragm value is smaller than a predetermined diaphragm value at which the lens has a predetermined depth of focus, the diaphragm is adjusted to the predetermined diaphragm value, and the shutter time (speed) is adjusted accordingly to provide a proper exposure.

Abstract: In a camera including a photoelectric converter device disposed in the substantial imaging plane of a phototaking lens, a device for detecting the in-focus or the out-of-focus of the phototaking lens with respect to an object to be photographed from an output of said photoelectric converter device, and a device responsive to the detecting device to drive and control the phototaking lens in a direction to be in focus with respect to the object, there is provided means responsive only to the detection of said in-focus by the detecting device to restrain the operation of the drive control device. The means includes timer means for enabling the continuance of said restraint during a predetermined time after the detection of the out-of-focus by the detecting device.

Abstract: An automatic focus detecting apparatus of a camera comprises a focus detecting unit for receiving the light from an object to be photographed and producing a focus detection output, a driving circuit responsive to the focus detection output to effect at least one of the driving of a phototaking lens and focus condition display, an object brightness detecting unit for producing a brightness detection output corresponding to the brightness of the object, means for producing a time count starting signal, a timer circuit adapted to start time count in response to the time count starting signal and produce a blocking signal in response to the brightness detection output for a short time if the brightness is high or for a long time if the brightness is low, and a blocking circuit for preventing the driving circuit from responding to the focus detection output during the time the blocking signal is produced.

Abstract: A film rewind device in a camera in which a rewind coupling is automatically engaged with a cassette shaft in response to rewind operation has a rotatable member having a spiral groove on its peripheral wall portion and said rewind coupling at the end of the shaft thereof, the rotatable member being slidable in axial direction and rotatable by rewind operation, and a meshing member meshing with the spiral groove at the initial stage of the rewind operation to thereby slide the rotatable member in axial direction to cause the coupling to engage the cassette shaft. The mesh engagement between the meshing member and the spiral groove is released in axial direction when the coupling engages the cassette shaft, so that the meshing member comes to support the rotatable member so as to block the return of the rotatable member in axial direction.